The
Industry
Global 2002 industry
revenues of are expected to reach .04b by 2007, driven by large-scale
public sector biometric deployments, the emergence of transactional
revenue models, and the adoption of standardized biometric infrastructures
and data formats.
Fingerprint-based technologies,
including both finger-scan and AFIS, are projected to account for
of 2002 industry revenues, far and away the largest technology segment.
This growth is attributable to the wide range of applications in
which fingerprint- based solutions operate effectively.
Civil ID and PC / Network
Access will be the leading biometric applications over the next
five years, expected to account for nearly in combined annual revenues
in 2007. Physical Access / Time and Attendance will reach in annual
revenues by 2004, with Surveillance and Screening applications projected
to reach in annual revenue in 2004.
The Government sector
will be the leading biometric vertical market through 2007 with
$1.2b in annual revenues. The Financial and the Travel/Transportation
sectors follow with and , respectively, in 2007. The various scenarios
in which government agencies must identify and authenticate both
citizens and employees, particularly subsequent to 9/11, is a critical
growth factor.
The
History of the FingerPrint
Among all the biometric
techniques, fingerprint-based identification is the oldest method
which has been successfully used in numerous applications. Everyone
is known to have unique, immutable fingerprints. A fingerprint is
made of a series of ridges and furrows on the surface of the finger.
The uniqueness of a fingerprint can be determined by the pattern
of ridges and furrows as well as the minutiae points. Minutiae points
are local ridge characteristics that occur at either a ridge bifurcation
or a ridge ending.
Fingerprint matching
techniques can be placed into two categories: minutae-based and
correlation based. Minutiae-based techniques first find minutiae
points and then map their relative placement on the finger. However,
there are some difficulties when using this approach. It is difficult
to extract the minutiae points accurately when the fingerprint is
of low quality. Also this method does not take into account the
global pattern of ridges and furrows. The correlation-based method
is able to overcome some of the difficulties of the minutiae-based
approach. However, it has some of its own shortcomings. Correlation-based
techniques require the precise location of a registration point
and are affected by image translation and rotation.
Fingerprint matching
based on minutiae has problems in matching different sized (unregistered)
minutiae patterns. Local ridge structures can not be completely
characterized by minutiae. We are trying an alternate representation
of fingerprints which will capture more local information and yield
a fixed length code for the fingerprint. The matching will then
hopefully become a relatively simple task of calculating the Euclidean
distance will between the two codes.
We are developing algorithms
which are more robust to noise in fingerprint images and deliver
increased accuracy in real-time. A commercial fingerprint-based
authentication system requires a very low False Reject Rate (FAR)
for a given False Accept Rate (FAR). This is very difficult to achieve
with any one technique. We are investigating methods to pool evidence
from various matching techniques to increase the overall accuracy
of the system. In a real application, the sensor, the acquisition
system and the variation in performance of the system over time
is very critical. We are also field testing our system on a limited
number of users to evaluate the system performance over a period
of time.
Fingerprint Classification:
Large volumes of fingerprints
are collected and stored everyday in a wide range of applications
including forensics, access control, and driver license registration.
An automatic recognition of people based on fingerprints requires
that the input fingerprint be matched with a large number of fingerprints
in a database (FBI database contains approximately 70 million fingerprints!).
To reduce the search time and computational complexity, it is desirable
to classify these fingerprints in an accurate and consistent manner
so that the input fingerprint is required to be matched only with
a subset of the fingerprints in the database.
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